To the Editor:—While attending a recent scientific meeting during which a beautifully illustrated series of cases of disseminated lupus erythematosus (LED) was presented, I could not help but be reminded of the following experiences.Within the past several years, I have seen two young women who had severe, prompt exacerbations of disseminated lupus after clinical photography. In each instance, the film used was of the daylight-color type and the light source, electronic flash, which has the capacity to produce ultraviolet rays. At the short distances required for close-ups, this can be considerable. One of these patients had a history of previous development of rash and exacerbation of her symptoms after exposure to sunlight. The second case was somewhat more puzzling since the apparent onset of disease was in the late fall, at a time when exposure to sunlight is unlikely to be harmful in this area. More intensive questioning